3.2.8 DUTY
Overload protection: effective value 250V . input sensitivity RMS：1V
3.2.9 Forward voltage drop of diode
Displaying approximate forward voltage values of diode. Measuring
condition: forward direct current is 1.5mA; opposite DC voltage is about 3 V.
3.2.10 Continuity Test
In the case that the resistance between two tested points is less than about 90
Ω ±20Ω,
the buzzer will bring up sound. Test condition:Open-circuit voltage is about 0.5V.
IV Operation
4.1 Instruction for control panel
(1) jaws
(2) Trigger
(3) Rotary switch ： This switch is used to select functions such as current.voltage,
capacitance.resistance,temperature,frequency,forward voltage drop of diode,continuity
and turn on/off the meter.
(4) “SELECT” button: When press the key continuously, change the range of all
function for a proper range you need.
(5) “RANGE” button: One may change the measuring range by pressing this button,
press this key to cycle from small to large range of each function
(6) INRUSH:measuring Inrush voltage, current key,in AC measuring function press the
key 2 seconds, it will measure the Inrush value, and show the "INR" symbol in the LCD,
INRUSH function can measure current or voltage with the minimum period up to valid
values 80mS,in the inrush mode, instrument automatically enter the manual range
function, if the measurement range is unknowed , press RANGE key to the maximum
range, first press the INRUSH button 2 seconds again inrush measurement will be
resumed, and the "INR" symbol disappear.
ZERO : zero key of DC current function, when measuring DC current and it is not
display zero without measuring,press ZERO key to make it display zero before measure.
DH : Data hold button: The user may hold the present reading and keep it on the
display by pressing the “DH” button. Press the button again to concel the data-hold
function
(7) LCD display
(8) “VΩ” jack: This is positive input terminal for voltage,resistance frequency,tempera-
ture,capacity and diode.
(9) “COM”jack: This is negative(ground)input terminal
(10) Barrier
Range
1%~99%
Resolution
0.1%
Accuracy
±(0.5%+3d）
4.
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